Leonie Claire Anne van Haeren

Leonie is a litigator at Ross Nasseri LLP with a broad civil and regulatory practice.

Leonie represents clients across a wide range of matters, including disputes involving corporate relationships, property interests, employment, and contractual rights. She has acted in claims relating to real estate transactions, shareholder and co-ownership disputes, wrongful dismissal, and the division of jointly held assets. She also represents clients in regulatory and provincial offences proceedings.

Leonie is a thoughtful and strategic litigator with strong advocacy skills and a practical approach to resolving disputes. She approaches each file with a clear focus on positioning her clients for the best possible outcome, whether through negotiated resolution or contested proceedings. She is detail-oriented, well-prepared, and brings sound judgment to the matters she works on.

Leonie has appeared in complex litigation early in her career and has secured two reported decisions within her first year of practice.

Prior to joining Ross Nasseri LLP, Leonie gained advocacy experience with the Crown Attorney’s Office, Community Legal Services of Ottawa, and Borden Ladner Gervais LLP, where she worked on a variety of litigation matters.

Leonie earned her J.D., magna cum laude, from the University of Ottawa. During law school, she held senior editorial roles with the Ottawa Law Review and led the research and authorship of Artificial Intelligence’s Impact on Legal Journals , a book published by the University of Ottawa Press. She also served as a Teaching Assistant in Criminal Law and Procedure.